The reason for selecting "seize" as the word similar in meaning to "USURP" is that both words involve taking something, typically power or authority, often unlawfully or forcibly. When someone "usurps" power, they are taking it without the legal right or authority to do so. Similarly, when someone "seizes" power or authority, they are taking it forcefully or without proper authorization. Both words convey the idea of taking control or authority in a way that is not legitimate or rightful, which is why "seize" is the appropriate synonym for "usurp."